The ancient Champa Kingdom ran from Danang to Nha Trang in the south. It was heavily influenced by Indian culture and the Chams adopted Sanskrit as a sacred language as well as adopting Hinduism. My Son was a religious centre from around 400 AD until about 1300. Many of the temples were dedicated to Shiva who was regarded as protector of Champa's dynasties.
American bombing destroyed much of My Son during the Vietnam-American war, but around 20 of the monuments escaped total devastation. The Vietnamese authorities are attempting to restore the remaining sites.
You can hire a car in either Danag or Hoi An to make the trip to My Son, or you can join one of the tour groups. If you decide to go independently it is best to get there early morning before the first of the tour groups arrive.
"Be sure to make the trip to My Son, it was absolutely amazing (and a great place to take pictures). Word of advice, take the early morning trip, it gets extremely hot in the after noon." - Darren